Bob, I bought mine as a C-4, which had the saddle for the 40M element already
mounted, so I can't comment on installation. The location for the 40M element
is shown on my drawing (# dwc4.003 - 1995) as 54" from the 20M reflector
centerline. My mast attachment is 87" from the reflector end of the boom, so
the 40M element would be ~87-54 = ~33" from the mast toward the reflector. Bear
in mind that F12 had several revisions of their drawings over the years, and
these might not be current. Best to check with Mark Hooper @ F12 for the latest
dimensions.
Mine works quite well; I appreciate the ability to rotate the dipole, and it's
bandwidth is very close to the advertised figure. I did find that I had to
stretch the hairpin coil more than I had expected, in order to get the SWR
minimized at resonance and thus full bandwidth. It's been up for well over ten
years with no failures and with only minimal maintenance.
There have been several posts on this reflector about substitute materials for
the linear loading wire...those should be in the archives.
Good Luck! You'll enjoy it.
73, Chuck, N4NM
----- Original Message -----
From: Bob K6UJ
To: towertalk@contesting.com
Sent: Tuesday, October 11, 2011 4:07 PM
Subject: [TowerTalk] adding 40 mtrs to C3
I have a Force 12 C3 and I'm considering buying their 40 meter dipole to
mount on the boom of the C3.
A couple of questions for someone that has done this to their C3:
How does it perform on 40 meters?
I have a copy of the C4 manual (which is a C3 with the 40 meter dipole) and
it doesn't show
a dimension locating the 40M dipole on the boom, is there already a
pre-drilled hole for adding the dipole ?
Lastly, how difficult was it to install on the boom of the C3 ? I think my
C3 has their easy on mount,
can I rotate the C3 on the mast and install the dipole without taking the C3
down off the tower ? (I hope)
Bob
K6UJ
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk